Fire door or shutter.



F. L. SAINO.

FIRE DOOR 0R SHUTTER.

APPLICATION FILED JUNE 8.1915.

Patented Nov. 7, 1916.

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F.-L. SA |NO. FIRE DOOR-0R SHUTTER. APPLICATION HLED JUNE 8,1915.

Patented Nov. 7, 1916.

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FIRE DOOR B, SHUTTER.

1,294,074L Specification of Letters Patent.

7 Patented Nov. '7, 1916. Application 'filed June 8, 1915. Serial No. 32,948.

respectively by folding the edges of the To all whom it may concern.

Be it known that I, FELIX L. 'SaINo, a sheets after the manner illustrated 1n Figs. 9 and 5. The side elements of the frame citizen of the United States, residing at o Memphis, Shelby county, and State of Tenconsist of a boxing or strip 6 having a nessee, have invented and discovered certain tongue 7 that enters between and is secured new and useful Improvements in Fire Doors to the shutter walls 1 and 3 by the rivets or Shutters, of which the following is a or bolts 8. And said strip 6 is formed with specification. a tongue 9 infolded within the lapped edge The present invention relates to fireproof 10 of the shutter wall 1. Thestrip 11 on doors and shutters and consists in the com the opposite side of the shutter is in like binations and arrangements of elements manner secured through its flange 12 and hereinafter described and particularly set has a folded edge 13 securing the tongue forth in the accompanying claims. 14.- of the boxing or extension 15 of the shut- The invention has for its purpose to proter wall 1. In the construction shown in vide a fire-proof door or shutter operable Fig. 7, the edge of the strip 10 forms the under high temperatures to uniformly eX- tongue and the edge of the wall is folded pand and effectively close the doorway or to provide the tongue-receiving groove. window opening and thereby avoid the cre- The shutter walls are each constructed of ation of drafts that necessarily occur when .a plurality of corrugated sheet metal secthese closures warp or buckle; and one tions whose respective edges are constructed wherein this feature obtains without detrito form tongue and groove elements 16 and ment to the otherwise favorable qualities 17 respectively, and which are assembled of these structures. in the manner shown in Figs. 3 and- 41-. The Another object of the invention is to concorrugations of said front and rear walls struct fire-proof door or shutter comprisare disposed in relatively angular relation ing releasably connected front and rear to the end of obtaining maximum rigidity walls made up respectively of sheet metal in structure and to allow of uniform expansections having lapped joints to readily alsion of the shutter as a whole in all direclow of uniform expansion of the several sections for the purpose of forming an effections, and, in addition thereto, to serve as tive closure with the window or door 88 reinforcing elements for the wall fabric. opening to forestall the creation of drafts The invention is shown, in its application that would otherwise occur if the shutter to a shutter, by way of illustration in the be allowed to warp or buckle. And in this accompanying drawings, wherein-- connection it will be noted that the shutter Figure 1 is a rear elevational view of the frame will, in like manner, accommodate 99 shutters closed, Fig. 2 a top plan view of itself to such increased dimensions that th the same, Fig. 3 a longitudinal sectional shutter walls may take. view of the shutter, Fig. e2 an enlarged de- The securing means for the shutter walls tail view illustrating the lapped joint, F ig. consists of a plurality of rivets or bolts 18 w 5 'an enlarged detail view of the base of (see Figs. 1 and 3) that pass through registhe flue stopper, Fig. 6 an enlarged detail tering slots 19 and '20 formed in the wall view of the fusible connection, and Fig. '7 sections, and said bolts are secured by upa fragmentary sectional view of a modified setting, or with nuts 21. A fusible washer form of joint in the shutter construction. 22 (see Fig. 6) is fitted on each of said bolts Referring to the construction in further and located on the fire side of the structure, 100 detail, each shutter consists of a front wall 0., against the rear wall 3 thereof, to the 1 constructed preferably of corrugated sheet end that the same will melt at a predetermetal, an intermediate sheet 2 of refractory mined temperature and release the bolt fassubstance such as asbestos, and a back wall toning when the several wall sections may 3 of corrugated sheet metal. The walls and expand and eflectively close the window or the intermediate sheet of each shutter comdoor opening, in the manner described and prise a single unit that is contained within for the purpose stated. In constructing and reinforced by a frame consisting of large doorsor shutters, it is proposed to upper and lower ridge members 4 and 5. additionally secure the sections of the front constituting flue stoppers that are formed and rear Walls thereof by passing bolts or rivets 18 through the central portions of the sheets, and having the fusible washers 19 on the inner or fire side, as above.

The flue stoppers 4t and 5 serve to prevent the flame from passing between the walls of the door, and, to avoid the occurrence of drafts and the incident passage of the flame along the hinged edges, draft plates 23 are secured to the rear walls 3 by a plurality of screws or bolts 24, or other fastening means, adjacent the hinged edge of the shutter. Said flue stoppers and draft plates form subject matter for separate and copending applications bearing the Serial Numbers 30,833 and 33,149, and dated May 27, 1915, and June 9, 1915, respectively.

The shutters are designed to be mounted on special types of hinges 23 and for which applicant has pending an application for United States Patent, bearing the serial Number 30,611, and dated May 26, 1915; and the shutter frame portions 10 form coniplementary engaging elements necessary to provide a perfect closure along the central middle line of the window.

It is-obvious that those skilled in the art may vary the details of construction and arrangement of parts without departing from the spirit of the invention, and therefore I do not wish to be limited to such features except as may be required by the claims.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a fire door or shutter, the combination of a supporting structure, a wall constructed of corrugated sheet metal sections provided with slots, said sections constructed each with a folded edge providing a groove and a straight edge forming a tongue, said tongues of the sections fitting within the grooves of their respective adj acent sections and forming slip joints therewith, members passing through said slots and the supporting structure and securing the sections to said structure, and fusible washers on said members operable to release the same and allow the separate sections of said wall to expand independently, substantially as set forth.

2. In a fire door or shutter, the combination of a front and a rear wall constructed of corrugated sheet metal sections having registering slots, said sections constructed each with a folded edge providing a groove and a straight edge formin a tongue, said tongues of the sections fitting within the grooves of their respective adjacent sections and forming joints therewith having clearances for relative movement of the joint members, members passing through said registering slots and securing said walls together, and fusible washers on said members operable to release the same and allow the separate sections of said walls to expand independently, substantially as set forth.

3. Ina fire door or shutter, the combination-of hingedly mounted parts each con-' structed of a front and a rear wall comprising sheet metal sections having registering slots and formed each with a folded edge providing a groove and a straight edge providing a tongue, said tongues of the sections fitting within the grooves of their respective adjacent sections and forming joints therewith having clearances for relative movement of the joint members, said sections constructed with boxings at the respective adjacent edges of the door parts and said boxings forming opposed flanges to provide a lapped joint between said parts, members passing through the registering slots of the sections and securing the walls together, and fusible washers on said members operable to release the same and allow said walls to expand, substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at Memphis, Tennessee, this 19th day of May, A. D. nineteen hundred and'fifteen.

FELIX L. SAINO. [L.S.]'

Witnesses:

JOHN L. STOUT, Jornv WV. FARLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

